Category: Geology questions

Is the hiding place a novel?

The Hiding Place is a 1971 book on the life of Corrie ten Boom, written by herself and John and Elizabeth Sherrill.…This article’s tone or style may not reflect the encyclopedic tone used on Wikipedia. First edition Author Corrie ten Boom Language English Genre Nonfiction, autobiography Publisher Chosen Books Is The Hiding Place fiction? The

How is tephra dangerous?

At the time of eruption, lighter ash fall extended to greater distances than shown here. Falling ash, even in low concentrations, can disrupt human activities hundreds of miles downwind, and drifting clouds of fine ash can endanger jet aircraft thousands of miles away. How can tephra affect people? Tephra falls may affect eyes and respiratory

What is a water sapphire?

Definition of water sapphire : a deep blue cordierite sometimes used as a gem. Why is iolite called water sapphire? Iolite is named after the Greek word “ios,” meaning violet. The rich purple-y to blue hues of iolite earned this gemstone the nickname of water sapphire. Are sapphires found in water? Iolite is also named

What are the disadvantages of shaft mining?

There is also an air shaft that gives the mine ventilation. Because it is an underground mine it has the possibility to collapse. Like other forms of mining it can release toxic particles into the water and air that you and I breathe. The main toxin is mercury, which aids in the recovery of the

What is a mineralized fossil?

Fossils changed by minerals are said to be mineralized. They can also be called petrified, or turned into stone. The minerals may have completely replaced the original tissues or filled in the tiny spaces in and between the cells. What is fossil mineralization? A common mode of fossilization is mineralization, the replacement of organic material

What is Lithification and what are the two most common processes that result in a rock’s Lithification?

During cementation, dissolved minerals crystallize and glue sediment grains together. Compaction and cementation, by far, represent the two most common processes involved in lithification, due to the widespread presence of soils and sediments worldwide. What are the two main processes of lithification? The main processes involved in lithification are compaction and cementation. What is lithification?

How is magnetic striping evidence of plate tectonics?

When the Earth’s magnetic field reverses, a new stripe, with the new polarity, begins. Such magnetic patterns led to recognition of the occurrence of sea-floor spreading, and they remain some of the strongest evidence for the theory of plate tectonics.When the Earth’s magnetic field reverses, a new stripe, with the new polarity, begins. Such magnetic

Who discovered Conrad discontinuity?

Gutenberg Discontinuity In the year of 1912 Weichert Gutenberg discovered this discontinuity at the depth of 2900 km beneath the earth surface. In this zone the velocity of seismic waves changes suddenly. When was the Conrad discontinuity discovered? The seismological discovery of the Conrad Conrad (1925) discovered another discontinuity in South Germany and Austria where

How is limonite mined?

It is usually formed from the chemical weathering of iron rich minerals, such as biotite, amphibole, pyroxene, and olivine, the hydration/oxidation of iron rich sulfide minerals, or from the hydration of magnetite and hematite. Limonite is commonly deposited in run-off streams resulting from mining operations. How is limonite formed? Description: Limonite is a general term

Is Slate soft or hard?

Slate is considered to be in between 2.5 to 4 on this scale in terms of hardness, which means that it is, on average, almost as hard as marble and limestone, but not as hard as granite or natural quartz. Is slate soft and smooth? Slate is characterized by fine foliation along which it breaks

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